Tobacco-stemming rolls.



UNrTnp @Tarts FnTnivT @einen JOSEPH GOODENOUGH IIAVENS, OF TRENTON, NEVJERSEY.

TOBACCO-erstmals@ aoLLs.'

SPECIFICATION :forming part f Letters :Patent No. 696,967, dated April8, 1902. i

Application iiled January 2l, 1902. Selill NO- 901605- (NO 11105613 Toa/ZZ w/"tom/ it may concern:

Be it known that I, JOSEPH GooDENoUeH I-IAVENS, a citizen of the UnitedStates, and a resident of Trenton, Mercer county, New Jersey, haveinvented a new and useful Improvementin Tobacco-StemmingRolls,of whichthe following is a specification.

My invention relates to the removal of the leaf portion of tobacco fromthe stem and to a stripping-roll constructed in accordance with a newprinciple discovered by me-namely, the cutting of the leaf away from thestem progressively by the action of cuttingsurfaces analogous in typeand operation to those of a milling-cutter, which surfaces surround thestern, the leaf being fed to said cutters at such a rate of speed aswill enable them most effectively to perfom their work.

My invention consists more particularly in the construction of thestripping-roll as herein set forth.

In the accompanying drawings, Figure 1 is a side elevation and partialsection of my improved stemming-rolls placed in j uxtaposition for use.Fig. 2 is a cross-section ou the line :c of Fig. 1.

Similar characters of reference indicate like parts.

1 and 2 are supporting-shafts, upon which are formed or to which aresecured in any suitable way the stemming-rolls 3 and 4. The roll 3 hason its periphery circumferential concave grooves 5, alternating withV-shaped channels 6. The roll 4 has on its periphery circumferentialgrooves 7, similar to grooves 5 of roll 3, alternating with tl-shapedprojecting ribs 8. When the rolls 3 and 4 are placed in operatingjuxtaposition, the ribs 8 of roll 4 enter the V-shaped channels 6 ofroll 3, as shown, while the grooves 5 and 7 form lenticular openings 9between said rolls. IVithin the grooves 5 and 7 are formedcutting-surfaces, which maybe teeth 10, extending transversely saidgrooves. The lenticular openings 9 are to be of such cross-sectionalarea as that the butt-end of the stem of the tobacco-leaf passingthrough them will become compressed, while at the same time subjected tothe cutting action all around its periphery of the teeth 10. The leafwhich extends laterally beyond the stern on each side is also slitlongitudinally by the shearing action of the tl-shaped ribs andchannels. In operation the rolls are rotated in the direction of thearrows a b, Fig. 2, while the leaf is fed in the direction of the arrowc by any suitable means. The rate of feed and speed of rotation of therolls is to be such as will permit the cutting-surface in the grooves toremove effectively the leaf portion from the stem portion.

The special advantages of the il-shaped rib and channel are that theyenable the cuttingsurfaces in the grooves to be more nearly approximatedthan if said surfaces formed a circular in place of a lenticular openingbetween the rolls, and in this way through the compression of the stemsaid cutting-surfaces are caused more eectively to act upon the leaf tocut the same from the stem. As these rolls are arranged in the machinemeans are usually provided to enable them to separate slightly in eventof foreign hard objects passing between them jointly with the leaf.. Insuch event if the surfaces between the grooves be not interlocked thetendency of the feed is to carry the leaf quickly onward through thenow-enlarged space, so that it may not then be properly acted on eitherby the cutting-teeth in the grooves or by the shearing edges adjoiningthe grooves; but where the interlocking of the V-shaped portions exists,then, as is evident, the separation of the interlocking surfaces to thenecessary extent does not make the channel between them any the lesstortuous, and hence the leaf cannot be carried through any the moreeasily, while the sharp shearing edges continue to act on the leafdespite such separation.

It will be observed that in the roll 3 a pair of cutting edges d ealternate with the grooves. In both rolls 3 and 4 the inclined portionsof the roll-periphery adjoining the grooves are smooth.

In another application for Letters Patent iiledby me December 9, 1901,Serial No.85,178, I have broadly claimed a roll adapted to remove theleaf portion of a tobacco-leaf from the stem having on its periphery aplurality of circumferential grooves, and within said grooves amultiplicity of small cutting projections, and in another applicationfor Letters Patent led by me January 21, 1902, Serial No. 90,604, I haveclaimed a leaf-stem- IOO ming roll having a circumferential groove andon each side of said groove inclined smooth portions of its periphery.The subject-matter of the aforesaid applications is not claimed herein.

I claiml. A leaf-stemming roll having circumferential grooves providedwith concave cuttingsurfaces, and alternating with said grooves pairs ofcircumferential cutting edges.

2. A leaf-stemming roll having circumferential grooves provided Withconcave cuttingsurfaces and alternating With said grooves V- shapedchannels, forming pairs of circumferential cutting edges.

3. A leaf-stemming roll having a circumferential groove provided With aconcave cuttingsurface formed of a multiplicity of small cuttingprojections, the said groove extending in cross-section over an arc lessthan a semicircle.

4. A leaf-stemming roll having a circumferential groove provided With aconcave cuttingsurface, and on each side of groove inclined smoothportions of its periphery.

5. A leaf-stemming roll havinga circumferential groove provided with aconcave cuttingsurface and in each side of said groove twooppositely-inclined portions of its periphery.

6. The combination of the roll 3 having the grooves containingcutting-teeth 10 and intermediate channels 6 with the roll 4 havinggrooves 7 and cutting-teeth l0 and intermediate ribs 8 of a conformationadapted to fit in said channels 6, substantially as described.

'7. The combination of the roll 3 having the grooves 5 containingcutting teeth 10, V- shaped intermediate channels 6 With the roll 4having grooves 7 and cutting-teeth l0 therein and the V-shaped ribs 8,substantially as described.

In testimony whereof I have signed my name to this specification in thepresence of tWo subscribing Witnesses.

JOSEPH GOODENOUGU IIAVENS.

Vitnesses:

I. A. VAN WART, H. R. MILLER.

